<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>用 <fieldset> 组合表单数据</title>
</head>
<body>

<form action="/demo/demo_form.asp">
  <fieldset>
    <legend>Personal information:</legend>
    First name:<br>
    <input type="text" name="firstname" value="Mickey">
    <br>
    Last name:<br>
    <input type="text" name="lastname" value="Mouse">
    <br><br>
    <input type="submit" value="Submit">
  </fieldset>
</form>

</body>
</html>